Soft-center ingot



J. J. GLYNN SOFT CENTER INGOT Filed April 22. 1921 attorney;

Patented Get, 7, 1924,

Jena 3. GLYNN, or EAST sevennar r, snoaera.

soar-CENTER, lime.

Application filed April 22, 1921. serial 463,464.

and useful Improvements in Soft-Center lngots, of which the following is a specification.

This invention relates to soft center ingots and has for its principal object to provide ingots of this nature which will be of extremely simple and inexpensive construction, efiicient and reliable in operation, and well adapted to the purpose for which they are designed.

Another object of the invention is to save time and labor in the construction of the ingots and at the same time obviate the danger of having the centers orystallizing when. forming. A still further object of my in.- vention to provide an iron or steel mold which is so shaped as to leave a center ready: to be put into a larger mold and carried into a finished ingot without rolling. or sawing to size and pickling in sulphuric acid and finally reheating in a muffiing fur nace before finally casting the harder metal around it, as has been ordinarily done in common practice.

With the above and numerous other ob-- jects in view, the invention resides in certain novel features of construction. and the com bination and arrangement of parts as will be hereinafter fully described and claimed.

In the drawings Figure 1 is a longitudinal vertical section taken through the mother mold showing the soft center therein.

Figure 2 is a section taken on the line 22 of Figure 1,

Figure 3 is a section taken on the line 33 of Figure 1 looking in the direction of the arrow,

Figure 4 is a perspective view of the master mold showing the soft center therein, and

Figure 5 is a section taken on the line mold and its ends are joined bending them lnwardly so as to overlap as indica'tejd at 41 The base plate 5 is placed in position and suitable centering bars 6 arev situated between. its upwardly entending flanges. 7.

and the sides of the mother mold This mother mold 2 is made in the usual manner and any suitable means may be provided for holding its two sections together. plurality of depressionsS arepifovided in the base plate 5' registering with the interior of the mold 2 whereby theprojectionswil inav be formed in the soft center. 'ltfwi'lldf course be understood thatthe strip 'ofslieet metal 39 Wlll have previously been immersed in hot water with a strong borax solution so u as to provide a thoroughly clean surface to lnsure a good Weld with the soft metal wlnch will be poured into the mother mold. It

will also be noted that the mother mold i s' constructed so that its walls at thetop will be thicker as indicated at lOthereby forni ing the riser 11 in the soft center. This riser will keep feeding the ingot-s during the cooling process immediately after pouringso as to give it a thoroughly solid construction thereby preventing the center from being porous as is a common occurrence in the present method. I 1

After the center has been formedfiit be removed from the mother mold and placed in the master niold l2 whicli'n'lay be of any preferred construction including the usual base plate 13. The soft center is placed. within the master mold so as to be suitably spaced from its side portions and it will be noted that the projections 9 will act as a stool or means for raising the soft center so as to allow the metal which is preferably a high carbon steel to be poured into the master mold to flow therebeneath.

The first step in the use of my invention is to set the mother mold up, as is clearly shown in Figs. 1 and 2 on the drawing. The strip of sheet metal 39 should be immersed in hot water, which has a strong solution of boraX therein. It is to be noted that the mother mold is so constructed that its walls at the top are thicker as indicated at 10. Soft steel is poured into the mother mold in a liquid state and by reason of the portion 10 of the mother mold a riser 11 is formed in the soft steel center. This riser will keep heating the ingot during the cooling process immediately after pouring, so as to give ita thoroughly solid construction thereby preventing the center from being porous as is common in the present method. After the soft steel center has been formed, it is removed and placed in a master mold 1.2 as is clearly shown in Fig. 4. As is clearly shown in Fig. 2, a plurality of depressions 8 are provided in the base plate 5 of the mother mold, so that when the soft steel is poured into the mother mold, projections 9 are formed. Thus it will be seen that when the soft center, is formed and put into position as shown in Fig. 4, the projections 9 will tend to hold the soft steel center in a spaced relation to the base 13 of the master mold 12. Thus it will be seen that when a high carbon steel is poured into the master mold in a liquid state, it will not only entirely surround the sides and edges of the soft center, but will also flow underneath of the same. The projections 9 do away with the necessity of having a special piece of steel made by a blacksmith to put into the mold to hold or lift the soft center from the bottom so as to allow the outside metal to flow under it when it is being cast. All this work and handling in this method is to be done while the steel is hot. It is to be further noted that when the metal is poured into the mold, it will fiow straight down and will not hit the sides so in that manner there will be uniform results throughout.

Having thus described my invention what I claim as new is:

1. A. mother mould for forming soft ceu ter for ingots, comprising a pair of side members joined at their ends, and a base member having depressions registered with the interior of the mould to form projections from the bottom of a soft center.

2. A mother mold for forming soft centers for ingots comprising two sections, the

upper portion of the sections being thickened so that the soft center will be provided with a tapered riser, and a base plate provided with a plurality of depressions registering with the interior of the mold so as to form projections from the bottom face of the soft center.

3. A mother mold for forming soft centers for ingots comprising two sections, the upper portions of the sections being thickened so that the soft center will be provided with a tapered riser, a strip of pickled sheet iron bent to form a lining for the n'rother mold and secured therein, and a base plate provided with depressions registering with the interior of the mold so as to form projec" tions from the bottom face of the soft center.

4-. A mother mold for forming soft centers for ingots comprising two sections, a base plate provided with depressions registering with the interior of the mold. said base plate having upwardly extending flanges, and centering bars situated between the upwardly extending flanges and the sides of the mother mold.

5. A process for forming soft center in gots consisting of the use of a mother mold and placing a strip of pickled sheeet metal therein, and bending it so as to conform with the contour of its interior, the use of a base plate for the mother mold, pouring the soft metal into the mother mold, placing the soft center thus formed after it has cooled into a master mold and pouring the metal there about in the usual manner.

In testimony whereof I aflix my signature in presence of two witnesses.

JOHN J. GLYNN.

\Vitnesses R. M. MORTON, H. M. SUNNO. 

